Soundproofing interior wall wood fiber / interior doors

We paid 20 euros per door and milling. According to the ventilation calculation, it was only needed at 4 doors and was therefore very manageable in terms of cost. I can only recommend it!

Is there any way to capture this in a calculation unit like e.g. db? Could not find anything in the technical sheets from Steico.

Raw density. The more, the better. 50 kg/m³ is OK for wood fiber, but rather not for mineral wool.

Does that make sense or is there hardly any added value?

What does the wall construction look like? Single stud, double stud, single, double or triple boarded? Spring rail? How are the adjacent components designed and connected to the partition walls?

Wall construction of the interior wall:

12.5mm Fermacell
120mm single stud
80mm wood fiber mat SteicoFlex WLG040
12.5mm Fermacell

In the meantime, I have received feedback from the manufacturer Steico, stating that the stud should deliberately not be fully insulated. If the mat touches both Fermacell panels, structure-borne sound will be transmitted from wall to wall. I was advised to consider a double layer of Fermacell sheathing.